Trevorite Mineral Data
General Trevorite Information
Chemical Formula:
NiFe+++2O4
Composition:
Molecular Weight = 231.86 gm
Magnesium 0.42 % Mg 0.70 % MgO
Aluminum 0.12 % Al 0.22 % Al2 O3
Iron 55.16 % Fe 9.30 % FeO / 68.53 % Fe2 O3
Nickel 16.71 % Ni 21.26 % NiO
Oxygen 27.60 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ni0.66 Fe2+ 0.3 Mg0.04 Fe3+ 1.99 Al0.01 O4
Environment:
In a small tabular body of nickeliferous serpentinite, probably a contact deposit, along the junction of quartzite and an ultramafic intrusive.
IMA Status:
Valid Species (Pre-IMA) 1921
Locality:
Found three km west of the Scotia talc mine, Bon Accord area, Barberton, Transvaal, South Africa. Link to MinDat.org Location Data.
Name Origin:
Named for Major Tudor Gruffydd Trevor, mining inspector for the Pretoria District, Transvaal, South Africa.
Name Pronunciation:
Trevorite + Pronunciation
Synonym:
ICSD 67846
PDF 10-325
Trevorite Image
Images:
Images:
Trevorite Crystallography
Cell Dimensions:
a = 8.41, Z = 8; V = 594.82 Den(Calc)= 5.18
Crystal System:
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
X Ray Diffraction:
By Intensity(I/Io ): 2.513(1), 1.476(0.4), 1.605(0.3),
Forms:
Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above
Forms:
( 1 1 1)
Warning: this java applet does not work in some browsers because of security restrictions.
Physical Properties of Trevorite
Cleavage:
None
Color:
Black.
Density:
5.165
Diaphaneity:
Opaque
Fracture:
Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Hardness:
5 - Apatite
Luster:
Metallic
Streak:
black
Optical Properties of Trevorite
Optical Data:
NCalc= 2.41 - from Gladstone-Dale relationship (KC = 0.2726) where Ncalc =Dcalc *KC +1 NCalc= 2.41 - from Gladstone-Dale relationship (KC = 0.2726) where Ncalc =Dmeas *KC +1
Calculated Properties of Trevorite
Electron Density:
Bulk Density (Electron Density)=4.94 gm/cc note: Specific Gravity of Trevorite =5.18 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PETrevorite = 23.61 barns/electronU=PETrevorite x r Electron Density= 116.72 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Trevorite is Not Radioactive
Trevorite Classification
Dana Class:
07.02.02.05 (07) Multiple Oxides
(07.02) (A+ B++)2 X4 Spinel group
(07.02.02) (Iron subgroup)
07.02.02.01 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m
07.02.02.02 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m
07.02.02.03 Magnetite FeFe2O4 F d3m 4/m 3 2/m
07.02.02.04 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m
07.02.02.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m
07.02.02.06 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m
07.02.02.07 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m
Strunz Class:
04.BB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
04.B - Metal:Oxygen = 3:4 and similar
04.BB -With only medium-sized cations
04.BB.05 Cochromite (Co,Ni,Fe)(Cr,Al)2O4 F d3m 4/m 3 2/m
04.BB.05 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m
04.BB.05 Magnetite FeFe2O4 F d3m 4/m 3 2/m
04.BB.05 Gahnite ZnAl2O4 F d3m 4/m 3 2/m
04.BB.05 Chromite FeCr2O4 F d3m 4/m 3 2/m
04.BB.05 Galaxite (Mn,Mg)(Al,Fe)2O4 F d3m 4/m 3 2/m
04.BB.05 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m
04.BB.05 Donathite ? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m
04.BB.05 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m
04.BB.05 Coulsonite FeV2O4 F d3m 4/m 3 2/m
04.BB.05 Hercynite FeAl2O4 F d3m 4/m 3 2/m
04.BB.05 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m
04.BB.05 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m
04.BB.05 Magnesiochromite MgCr2O4 F d3m 4/m 3 2/m
04.BB.05 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m
04.BB.05 Magnesiocoulsonite MgV2O4 F d3m 4/m 3 2/m
04.BB.05 Manganochromite (Mn,Fe)(Cr,V)2O4 F d3m 4/m 3 2/m
04.BB.05 Qandilite (Mg,Fe)2(Ti,Fe,Al)O4 F d3m 4/m 3 2/m
04.BB.05 Nichromite (Ni,Co,Fe)(Cr,Fe,Al)2O4 F d3m 4/m 3 2/m
04.BB.05 Spinel MgAl2O4 F d3m 4/m 3 2/m
04.BB.05 Ulvospinel TiFe2O4 F d3m 4/m 3 2/m
04.BB.05 Zincochromite ZnCr2O4 F d3m 4/m 3 2/m
04.BB.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m
04.BB.05 Vuorelainenite (Mn,Fe)(V,Cr)2O4 F d3m 4/m 3 2/m
Other Trevorite Information
References:
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Trevorite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
Search for Trevorite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Trevorite :
Ask about Trevorite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
Print or Cut-and-Paste your Trevorite Specimen Label here :
Trevorite
NiFe+++2O4
Dana No: 07.02.02.05 Strunz No: 04.BB.05
Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.